Regal Rexnord
Grid Couplings
Regal Rexnord grid couplings are a unique flexible - coupling design that transmits torque through a serpentine spring - steel grid element seated in machined grooves in the coupling hubs — providing a torsionally soft connection with excellent shock - absorption and vibration - damping characteristics.As the coupling rotates under load, the grid element flexes and progressively wraps around the hub teeth, creating a variable stiffness that softens the torsional response to impact loads and reduces the peak torque transmitted during startup and transient conditions.This distinctive characteristic makes grid couplings the technology of choice for applications subject to frequent shock loading, torque reversal, or high - inertia starts — including crushers, mixers, shredders, reciprocating pumps, and compressor drives in aggregate, mining, paper, and general industrial sectors.Under the Rexnord and Link - Belt brands, our grid coupling line includes horizontal and vertical configurations, spacer designs for pump separation, full and half - spacer styles, and complete kits with factory - lubricated covers.Plant maintenance engineers value grid couplings for their ability to protect connected equipment from torque spikes, their tolerance of moderate misalignment, and their simple, inspectable construction that can be serviced with standard hand tools in the field.
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Progressive Torsional Stiffness for Shock Absorption
The grid - spring design provides lower stiffness at low torque(allowing torsional wind - up that absorbs impact) and higher stiffness at full torque(maintaining positioning accuracy) — an inherent mechanical advantage unavailable in linear - stiffness couplings.
Vibration Damping Through Grid Friction
The sliding contact between the grid and hub teeth under torsional deflection dissipates vibration energy, reducing the transmission of damaging vibration from the driving to the driven machine.
Split Grid Element for In - Situ Replacement
The grid element is split into multiple segments that can be removed and replaced without disturbing hub or machine alignment — a 30 - minute field service that restores full coupling performance.
Full & Spacer Configurations Available
Close - coupled full - style, spacer - style for standard pump separation distances, and half - spacer designs for limited float applications — a configuration for virtually every industrial drive layout.
Lubricated for Long Wear Life
Factory - filled or field - lubricated covers retain the grease that lubricates the grid / hub contact surfaces, minimizing wear and protecting against corrosion in humid or mildly aggressive atmospheres.
Interchangeable with Industry Standard Dimensions
Rexnord grid couplings are dimensionally interchangeable with competitive grid couplings(Falk Steelflex type), enabling straightforward replacement without dimensional modifications.
Grid Couplings for Crushers, Shredders & High - Shock Applications
Aggregate crushers, car shredders, hammermills, and chippers subject their drivetrains to shock loads that can instantaneously multiply nameplate torque by three to five times.Conventional couplings transmit these spike torques directly to the gearbox and motor, accelerating fatigue damage and causing frequent coupling - element failures.Rexnord grid couplings absorb a significant portion of this impact energy through torsional wind - up of the grid element, effectively reducing the peak torque seen by upstream and downstream equipment.Crusher operators who have converted from gear or elastomeric couplings to grid couplings report dramatic reductions in coupling - element replacement frequency, gearbox input - bearing failures, and motor - shaft fatigue fractures.The ability to replace the grid element without moving the motor or crusher — often during a single - shift maintenance window — further enhances the operating economics of grid couplings in these high - wear applications.For any application characterized by irregular shock loading or frequent starts under load, grid couplings represent a proven, cost - effective strategy for protecting the capital investment in the drive system.
Grid, Gear, and Elastomeric Couplings: Application Selection Comparison
Each coupling technology offers a distinct balance of torsional stiffness, damping, misalignment capacity, and maintainability that matches different application profiles.Grid couplings provide the best shock - absorption and vibration - damping characteristics among metallic - flexing couplings, making them ideal for crushers, shredders, and reciprocating machinery.Gear couplings offer the highest torque density and are preferred where space constraints demand the most compact coupling envelope for a given torque.Elastomeric couplings provide the highest inherent damping and are selected when torsional isolation of engine firing pulses or compressor torque reversals is the primary requirement.For many general industrial drives with moderate misalignment and minimal shock loading, the selection among these three technologies may be driven by installed - base standardization, local distributor availability, or maintenance - team familiarity.Regal Rexnord’s application - engineering team leverages the company’s multi - technology coupling portfolio to recommend the optimal coupling type for each drive point, free of the bias that comes from a single - technology supplier.